- About
- Mission Statement
Education. Evidence. Regrowth.
- Education.
Prioritize knowledge. Make better choices.
- Evidence.
Sort good studies from the bad.
- Regrowth.
Get bigger hair gains.
Team MembersPhD's, resarchers, & consumer advocates.
- Rob English
Founder, researcher, & consumer advocate
- Research Team
Our team of PhD’s, researchers, & more
Editorial PolicyDiscover how we conduct our research.
ContactHave questions? Contact us.
Before-Afters- Transformation Photos
Our library of before-after photos.
- — Jenna, 31, U.S.A.
I have attached my before and afters of my progress since joining this group...
- — Tom, 30, U.K.
I’m convinced I’ve recovered to probably the hairline I had 3 years ago. Super stoked…
- — Rabih, 30’s, U.S.A.
My friends actually told me, “Your hairline improved. Your hair looks thicker...
- — RDB, 35, New York, U.S.A.
I also feel my hair has a different texture to it now…
- — Aayush, 20’s, Boston, MA
Firstly thank you for your work in this field. I am immensely grateful that...
- — Ben M., U.S.A
I just wanted to thank you for all your research, for introducing me to this method...
- — Raul, 50, Spain
To be honest I am having fun with all this and I still don’t know how much...
- — Lisa, 52, U.S.
I see a massive amount of regrowth that is all less than about 8 cm long...
Client Testimonials150+ member experiences.
Scroll DownPopular Treatments- Treatments
Popular treatments. But do they work?
- Finasteride
- Oral
- Topical
- Dutasteride
- Oral
- Topical
- Mesotherapy
- Minoxidil
- Oral
- Topical
- Ketoconazole
- Shampoo
- Topical
- Low-Level Laser Therapy
- Therapy
- Microneedling
- Therapy
- Platelet-Rich Plasma Therapy (PRP)
- Therapy
- Scalp Massages
- Therapy
More
IngredientsTop-selling ingredients, quantified.
- Saw Palmetto
- Redensyl
- Melatonin
- Caffeine
- Biotin
- Rosemary Oil
- Lilac Stem Cells
- Hydrolyzed Wheat Protein
- Sodium Lauryl Sulfate
More
ProductsThe truth about hair loss "best sellers".
- Minoxidil Tablets
Xyon Health
- Finasteride
Strut Health
- Hair Growth Supplements
Happy Head
- REVITA Tablets for Hair Growth Support
DS Laboratories
- FoliGROWTH Ultimate Hair Neutraceutical
Advanced Trichology
- Enhance Hair Density Serum
Fully Vital
- Topical Finasteride and Minoxidil
Xyon Health
- HairOmega Foaming Hair Growth Serum
DrFormulas
- Bio-Cleansing Shampoo
Revivogen MD
- more
Key MetricsStandardized rubrics to evaluate all treatments.
- Evidence Quality
Is this treatment well studied?
- Regrowth Potential
How much regrowth can you expect?
- Long-Term Viability
Is this treatment safe & sustainable?
Free Research- Free Resources
Apps, tools, guides, freebies, & more.
- Topical Finasteride Calculator
- Interactive Guide: What Causes Hair Loss?
- Free Guide: Standardized Scalp Massages
- 7-Day Hair Loss Email Course
- Ingredients Database
- Interactive Guide: Hair Loss Disorders
- Treatment Guides
- Product Lab Tests: Purity & Potency
- Evidence Quality Masterclass
- More
Articles100+ free articles.
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Cannabidiol (CBD) Increases Hair Counts By 246%? Not So Fast.
-
Creatine: Does It Worsen Hair Loss? It Depends On The Hair Loss Type.
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Can Progesterone Improve Hair Regrowth?
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CRABP2: Can This Gene Predict Regrowth From Retinoids?
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BTD: Can This Gene Predict Regrowth From Biotin?
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COL1A1: Can This Gene Predict Regrowth From Collagen Support?
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2dDR For Hair Loss: What Do We Know So Far About This Sugar?
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CYP19A1: Can This Gene Predict Regrowth From Hormone Therapy?
PublicationsOur team’s peer-reviewed studies.
- Microneedling and Its Use in Hair Loss Disorders: A Systematic Review
- Use of Botulinum Toxin for Androgenic Alopecia: A Systematic Review
- Conflicting Reports Regarding the Histopathological Features of Androgenic Alopecia
- Self-Assessments of Standardized Scalp Massages for Androgenic Alopecia: Survey Results
- A Hypothetical Pathogenesis Model For Androgenic Alopecia:Clarifying The Dihydrotestosterone Paradox And Rate-Limiting Recovery Factors
Menu- AboutAbout
- Mission Statement
Education. Evidence. Regrowth.
- Team Members
PhD's, resarchers, & consumer advocates.
- Editorial Policy
Discover how we conduct our research.
- Contact
Have questions? Contact us.
- Before-Afters
Articles
Explore the science behind hair loss and hair growth. Our in-depth articles cover topics ranging from natural remedies to pharmaceuticals to breakthroughs in hair loss science. Want to request an article topic? Contact us.
IngredientsPharmaceuticalsNatural RemediesCompany Reviews
By Sarah King, PhDOct 11, 2024Cannabidiol (CBD) Increases Hair Counts By 246%? Not So Fast.
CBD, a non-psychoactive compound from Cannabis sativa, is being explored for hair regrowth due to its anti-inflammatory, antioxidant, and circulation-boosting properties. Small studies on CBD topicals for androgenic alopecia (AGA) show hair count increases between 55% and 246% over six months. At a ...
By Sarah King, PhDSep 27, 2024Creatine: Does It Worsen Hair Loss? It Depends On The Hair Loss Type.
Creatine, a substance that supports energy production in the muscles and brain, is commonly used as a supplement to boost athletic performance. However, its potential link to hair loss has raised concerns, particularly due to its effect on dihydrotestosterone (DHT), a hormone associated with androge...
By Sarah King, PhDSep 18, 2024Can Progesterone Improve Hair Regrowth?
Progesterone is a hormone that plays a vital role in female reproductive health. Deficiencies in progesterone have been linked to hair thinning, particularly in conditions like female pattern hair loss (FPHL) and postpartum telogen effluvium (PPTE). While natural progesterone seems to have 5-alpha-r...
By Ben Fletcher, PhDSep 10, 2024CRABP2: Can This Gene Predict Regrowth From Retinoids?
The CRABP2 gene, which plays a role in retinoic acid metabolism, has been linked to hair health. Retinoic acid, a derivative of vitamin A, is known to influence hair growth, and some studies suggest CRABP2 may also be involved. However, the evidence connecting CRABP2 variants to hair loss and treatm...
By Ben Fletcher, PhDSep 8, 2024BTD: Can This Gene Predict Regrowth From Biotin?
The BTD gene, responsible for encoding the enzyme biotinidase, is crucial for biotin metabolism. Biotin, or vitamin B7, plays a significant role in hair health, and biotinidase deficiency—caused by BTD polymorphisms—can lead to hair loss conditions like alopecia. While some studies suggest that biot...
By Ben Fletcher, PhDSep 4, 2024COL1A1: Can This Gene Predict Regrowth From Collagen Support?
The COL1A1 gene, responsible for producing a key component of type 1 collagen, has been associated with hair growth and structure. Certain genetic variations in COL1A1 might affect the balance of collagen chains, potentially influencing hair loss and the response to treatments. However, the current ...
By Sarah King, PhDSep 4, 20242dDR For Hair Loss: What Do We Know So Far About This Sugar?
2dDR Hair introduces hair care products featuring 2-deoxy-D-ribose (2dDR), a naturally occurring sugar, claiming it can support hair regrowth. While a recent mouse study shows favorable results, there is currently no clinical evidence in humans to support its effectiveness or safety. In fact, after ...
By Ben Fletcher, PhDSep 4, 2024CYP19A1: Can This Gene Predict Regrowth From Hormone Therapy?
Can your genes predict the effectiveness of hormone therapy for hair loss? The CYP19A1 gene, which encodes the enzyme aromatase, has been linked to hair growth and hair loss, particularly in androgenetic alopecia (AGA). Some studies suggest that certain CYP19A1 variants might influence the effective...
By Ben Fletcher, PhDAug 27, 2024ACE: Can This Gene Predict Regrowth From Treatments Targeting Blood Flow?
This article explores the potential link between angiotensin-converting enzyme (ACE) activity and hair loss, particularly in the context of androgenic alopecia (AGA) and alopecia areata (AA). While ACE plays a crucial role in blood pressure regulation and vasoconstriction, there is limited evidence ...
By Sarah King, PhDAug 21, 2024NR3C1: Can This Gene Predict Responsiveness to Glucocorticoids?
The NR3C1 gene codes for the glucocorticoid receptor, a key player in the regulation of metabolism, immune response, and stress adaptation. Variations in the NR3C1 gene, such as the rs6198 SNP, have been linked to differences in glucocorticoid sensitivity with some variants leading to increased expr...Stop guessing which hair loss
treatments actually workInstead, just read our cheat sheet
You’ll get the facts on nine “natural” and “conventional” hair loss treatments: how they work, how much hair they’ll regrow, their limitations, and what their marketers don’t want you know.
- Mission Statement